HDTV Listings for March 22, 2007

What we're watching: March Madness is here, the Sweet Sixteen is on CBS tonight and your favorite team should always be in HD. An Inconvenient Truth is also on Showtime tonight, but we can always wait until the day after tomorrow to learn about global warming.

Our traditional high definition listings continue below.

All times are Eastern and reruns are in italics, finales in bold: ABC (720p): Ugly Betty (8 p.m.), Grey's Anatomy (9 p.m.), October Road (10 p.m.)